Model building is the systematic process of constructing simplified, abstract representations, often mathematical or computational, of real-world systems, phenomena, or concepts. This methodology serves as a core research approach across scientific and engineering disciplines to investigate complex structures and dynamics through abstraction, analysis, and simulation. Its significance lies in enabling prediction, hypothesis testing, design optimization, and enhanced understanding of systems that are inaccessible or too intricate for direct empirical study, providing crucial insights for theoretical advancement and practical application.